[nflug] Cisco Switch question on cloned NIC card

David J. Andruczyk djandruczyk at yahoo.com
Fri Jun 2 08:46:40 EDT 2006


Tis been so long since I was on a cisco (almost 4 years),  but I
believe the command is something like "logging buffered ..." (hit "?"
after that to get a list of options, I belive it'll list facility
values (think of unix syslog) and "info" would get you a LOT of
logging, so be careful with that one,  but try levels in turn that show
you interface up/down messages, and minimize the other info (use a test
port to plug in/out of and a test system to check if the logging is
behaving)


--- anthonyriga <torrodimerda at yahoo.com> wrote:

> Dave
> Its a 3650G Catalyst.
> 
> --- "David J. Andruczyk" <djandruczyk at yahoo.com>
> wrote:
> 
> > What model switch and firmware is in use on it?
> > (i.e. enterprise, std,
> > etc)
> > 
> > 
> > --- anthonyriga <torrodimerda at yahoo.com> wrote:
> > 
> > > Ok I,m still learning the cisco stuff how do I
> > turn on
> > > the logging to do this? Thanks for the help!!!!
> > > 
> > > --- "David J. Andruczyk" <djandruczyk at yahoo.com>
> > > wrote:
> > > 
> > > > 
> > > > 
> > > > --- anthonyriga <torrodimerda at yahoo.com> wrote:
> > > > 
> > > > > They are setup as failover if I pull one cat5
> > out
> > > > the
> > > > > other still works. 
> > > > > 
> > > > 
> > > > Turn up logging on the switch and the port
> > change
> > > > messages will tell
> > > > you the ports that the lines are plugged into.
> > > > 
> > > > 
> > > > > --- "David J. Andruczyk"
> > <djandruczyk at yahoo.com>
> > > > > wrote:
> > > > > 
> > > > > > 
> > > > > > It sounds like they aren't configured for
> > load
> > > > > > balance,  but as
> > > > > > failover (hence the single mac for both
> > ports)
> > > > > > 
> > > > > > How doe you have then comfigured for sure on
> > the
> > > > > > server side?
> > > > > > 
> > > > > > One way you can tell is to enable full
> > > > > > logging/debugging on the switch
> > > > > > and pull the connections out one at a time
> > and
> > > > note
> > > > > > the log entries
> > > > > > generated. (it'll also give you clues if you
> > > > have
> > > > > > failover configured
> > > > > > correctly), beware this isn't recommended
> > > > practice
> > > > > > on production
> > > > > > servers unless you have a downtime window
> > that
> > > > can
> > > > > > be made use of.
> > > > > > 
> > > > > > 
> > > > > > --- anthonyriga <torrodimerda at yahoo.com>
> > wrote:
> > > > > > 
> > > > > > > Company I am working for has about 20 or
> > so
> > > > > > servers
> > > > > > > setup with the Intel GIG NIC cards cloned
> > for
> > > > > > > redundancy and network load balance. The
> > nic
> > > > cards
> > > > > > > have 2 ports on them  but 1 mac address. I
> > am
> > > > > > trying
> > > > > > > to figure out what ports the actual CAT5
> > cable
> > > > is
> > > > > > > connecting too from the server to the the
> > GIG
> > > > > > switch
> > > > > > > without tracing everything manually
> > becasuse
> > > > the
> > > > > > > cables are a mess.
> > > > > > >  I have been sucessful getting the ports
> > on
> > > > the
> > > > > > non
> > > > > > > Intel cards that only have 1 port on them.
> > I
> > > > have
> > > > > > been
> > > > > > > doing a show arp then using the show
> > > > > > mac-address-table
> > > > > > > | in nnnn
> > > > > > >  where nnnn has any character of the mac
> > > > address
> > > > > > in
> > > > > > > it...
> > > > > > >  
> > > > > > > It will then show you the port the mac
> > address
> > > > is
> > > > > > > assigned to..
> > > > > > > The NIC cards with 2 cat5 cables going to
> > the
> > > > > > switch
> > > > > > > only show 1 port becasue there is only 1
> > mac
> > > > > > address
> > > > > > > it reconizes. Any suggestions on how to
> > show
> > > > the
> > > > > > other
> > > > > > > port? 
> > > > > > > 
> > > > > > >
> > > >
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> > > > > > 
> > > > > > 
> > > > > > Dave J. Andruczyk
> > > > > > 
> > > > > >
> > > >
> > __________________________________________________
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> > > > 
> > > > 
> > > > Dave J. Andruczyk
> > > > 
> > > >
> > __________________________________________________
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> > 
> > 
> > Dave J. Andruczyk
> > 
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> 
> 
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Dave J. Andruczyk

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